Double rubber bushing capable of improving axial limiting and preventing friction noise

Abstract

The utility model discloses a double rubber bushing of can improve axial location and prevent friction heterophonic, including the inner cover, the main body rubber is set up to the inner cover outside, the outer cover is set up to the main body rubber outside, the anti -collision rubber is set up to the outer cover upper portion, the outer cover, main body rubber, inner cover and anti -collision rubber are integrated vulcanization through vulcanization process, through setting up the anti -collision rubber of integrated vulcanization on the outer cover upper portion, adopt the high hardness rubber material of different with rubber main body with self -lubricating performance, cooperate its unique impact surface design, not only can effectively promote the axial location and durability of swing arm bushing, can also effectively eliminate the impact, friction heterophonic that the anti -collision rubber and the whole car between the hand tool produced when axial impact, solve the rubber swing arm bushing in the prior art in long -term use, because rubber material exists low stiffness, creep characteristic and easy aging cracking etc.

Description

Technical Field

[0001] This utility model belongs to the field of bushing technology, specifically, it relates to a double rubber bushing that can improve axial positioning and prevent friction noise. Background Technology

[0002] With the continuous development of the automotive industry, consumers' demands for vehicle quality are gradually increasing. To meet these demands, the overall size of vehicles is constantly increasing, and the weight of the vehicle is also increasing accordingly. This is especially true for electric vehicles, where the increase in weight is even more pronounced due to the weight of the battery pack. This increased weight leads to a greater load on the control arms during actual use, which places more stringent requirements on the durability of the bushings and their ability to prevent abnormal noises.

[0003] Existing rubber control arm bushings, due to the low stiffness and creep characteristics of the rubber material, are prone to excessive deformation when subjected to longitudinal loads during vehicle acceleration, deceleration, or braking. This leads to a shift in suspension positioning parameters, affecting handling stability and tire lifespan. Furthermore, under long-term alternating stress, the rubber material is prone to aging, cracking, hardening, or delamination from the metal frame. At the same time, its internal damping characteristics fluctuate with temperature changes, easily producing a "creaking" noise under bumpy or steering conditions, seriously affecting the overall NVH performance of the vehicle and thus having certain limitations. Utility Model Content

[0004] This utility model proposes a double rubber bushing that can improve axial limiting and prevent friction noise, in order to solve the technical problems of insufficient axial limiting capacity and prominent abnormal noise caused by the low stiffness, creep characteristics and easy aging and cracking of existing rubber swing arm bushings during long-term use.

[0005] The objective of this utility model can be achieved through the following technical solutions: A double-rubber bushing that can improve axial limiting and prevent friction noise includes an inner bushing; a main body rubber is provided on the outside of the inner bushing; an outer bushing is provided on the outside of the main body rubber; and an anti-collision rubber is provided on the upper part of the outer bushing; the outer bushing, the main body rubber, the inner bushing, and the anti-collision rubber are vulcanized as a whole by a vulcanization process.

[0006] Furthermore, a through groove is provided in the center of the inner sleeve.

[0007] Furthermore, the upper and lower parts of the main rubber body are both provided with recesses.

[0008] Furthermore, the cross-section of the outer jacket is a basic L-shaped structure, and the vertical portion of the L-shape forms a mechanical stop.

[0009] Furthermore, the upper surface of the anti-collision rubber is provided with multiple grooves at equal intervals.

[0010] Furthermore, the upper surface of the anti-collision rubber is also provided with multiple protrusions at equal intervals. These protrusions are staggered with the grooves, and the protrusions are circular in structure.

[0011] Furthermore, the anti-collision rubber has a ring-shaped structure, and the groove provides deformation space for the anti-collision rubber to form an air damping cavity.

[0012] The beneficial effects of this utility model are: 1. This utility model incorporates an integrally vulcanized anti-collision rubber on the upper part of the outer sleeve. This anti-collision rubber is made of a high-hardness rubber material with self-lubricating properties, different from the main rubber material. Combined with its unique impact surface design, it not only effectively improves the axial limiting and durability of the swing arm bushing, but also effectively eliminates the impact and friction noise generated between the anti-collision rubber and the vehicle's hand components during axial impact. This solves the technical problem of insufficient axial limiting capacity and prominent noise in existing rubber swing arm bushings due to the low stiffness, creep characteristics, and susceptibility to aging and cracking of the rubber material during long-term use.

[0013] 2. This utility model features multiple grooves and protrusions equidistantly arranged on the anti-collision rubber, with the grooves and protrusions staggered. The grooves and protrusions work together to form a wave-shaped contact surface, reducing the impact load. At the same time, the circular protrusion design makes the contact stress distribution more uniform, ensuring sufficient rigidity while avoiding rigid impact. Moreover, the grooves act as lubricant storage chambers, and together with the self-lubricating material on the surface of the protrusions, they reduce the coefficient of friction. The staggered arrangement effectively disrupts the acoustic resonance conditions and effectively prevents abnormal noise.

[0014] 3. The cross-section of the outer jacket of this utility model presents a basic L-shaped structure. The vertical part of the L-shape forms a mechanical stop, which significantly enhances the axial limiting ability and can effectively reduce axial displacement. The horizontal part of the L-shape serves as the supporting matrix of the main rubber body. Through the vulcanization process, it forms an integrated structure to ensure effective load transfer. The unique corner design optimizes stress distribution, avoids local stress concentration, and extends product life. At the same time, the L-shaped contour provides a precise installation positioning reference for the anti-collision rubber and facilitates the positioning and demolding of the vulcanization mold, improving manufacturing consistency.

[0015] 4. The inner sleeve, main body rubber, outer sleeve and anti-collision rubber in this utility model are all vulcanized in one piece by vulcanization process to form a seamless bond, which improves the interface bonding strength, improves the overall stiffness consistency, completely eliminates the component displacement risk of traditional assembled bushings, and realizes a comprehensive improvement in the performance, quality and reliability of bushing products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of the overall structure of this utility model; The attached diagram lists the components represented by each number as follows: 1. Outer sleeve; 2. Groove; 3. Through groove; 4. Inner sleeve; 5. Main rubber body; 6. Protrusion; 7. Anti-collision rubber. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 - Figure 3 As shown, a double-rubber bushing that can improve axial limiting and prevent friction noise includes an inner sleeve 4, which has a near-cylindrical structure; a through groove 3 is provided in the center of the inner sleeve 4, which serves as a connection interface to precisely fit with the suspension system and ensure accurate installation positioning; a main body rubber 5 is provided on the outside of the inner sleeve 4, and the inner sleeve 4 and the main body rubber 5 are integrally vulcanized together in a sleeve-like manner; the upper and lower parts of the main body rubber 5 are provided with recesses, which serve as buffer areas to provide additional deformation space when subjected to axial force, effectively absorbing impact energy.

[0019] The outer sleeve 1 is provided around the main rubber 5. The cross-section of the outer sleeve 1 is basically L-shaped. The outer sleeve 1, the main rubber 5, and the inner sleeve 4 are integrally formed by vulcanization. The vertical part of the L-shape forms a mechanical stop, which significantly enhances the axial limiting ability and can reduce axial displacement. The horizontal part of the L-shape serves as the supporting matrix of the main rubber 5. It is integrated into a structure through vulcanization to ensure effective load transfer.

[0020] The upper part of the outer jacket 1 is provided with anti-collision rubber 7, which has a ring structure and is integrally formed with the outer jacket 1 through a vulcanization process. Multiple grooves 2 are equidistantly arranged on the upper surface of the anti-collision rubber 7. The grooves 2 provide deformation space for the rubber, reduce local stress, and form an air damping cavity to absorb vibration energy. Multiple protrusions 6 are also equidistantly arranged on the upper surface of the anti-collision rubber 7. The protrusions 6 are staggered with the grooves 2 and have a circular structure. The protrusions 6 reduce the initial impact force through progressive contact and reduce the friction coefficient of the self-lubricating material concentrated on its top.

[0021] The anti-collision rubber 7 is made of high-hardness rubber with self-lubricating function. It works in conjunction with the groove 2 and the protrusion 6 to not only effectively improve the axial limiting and durability of the bushing, but also eliminate the impact and friction noise between the anti-collision rubber 7 and the vehicle parts during axial impact.

[0022] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below: This invention features an integrally vulcanized anti-collision rubber 7 on the upper part of the outer sleeve 1. This rubber is made of a high-hardness rubber material with self-lubricating properties, different from the main rubber material. Combined with its unique impact surface design, it not only effectively improves the axial limiting and durability of the swing arm bushing, but also effectively eliminates the impact and friction noise generated between the anti-collision rubber 7 and the vehicle's hand components during axial impact. This solves the technical problem of insufficient axial limiting capacity and prominent noise in existing rubber swing arm bushings due to the low stiffness, creep characteristics, and susceptibility to aging and cracking of the rubber material during long-term use.

[0023] Furthermore, this invention features multiple grooves 2 and protrusions 6 equidistantly arranged on the anti-collision rubber 7, with the grooves 2 and protrusions 6 arranged in an alternating pattern. The grooves 2 and protrusions 6 work together to form a wave-shaped contact surface, reducing the impact load. At the same time, the circular protrusions 6 design makes the contact stress distribution more uniform, ensuring sufficient rigidity while avoiding rigid impact. Moreover, the grooves 2 serve as lubricant storage chambers, which, together with the self-lubricating material on the surface of the protrusions 6, reduce the coefficient of friction. The alternating structure effectively disrupts the acoustic resonance conditions and effectively prevents abnormal noise.

[0024] Furthermore, the cross-section of the outer jacket 1 of this utility model presents a basic L-shaped structure. The vertical part of the L-shape forms a mechanical stop, which significantly enhances the axial limiting ability and can effectively reduce axial displacement. The horizontal part of the L-shape serves as the supporting matrix of the main rubber 5. Through the vulcanization process, it forms an integrated structure to ensure effective load transfer. The unique corner design optimizes stress distribution, avoids local stress concentration, and extends product life. At the same time, the L-shaped contour provides a precise installation positioning reference for the anti-collision rubber 7 and facilitates the positioning and demolding of the vulcanization mold, improving manufacturing consistency.

[0025] Furthermore, the inner sleeve 4, the main body rubber 5, the outer sleeve 1, and the anti-collision rubber 7 in this utility model are all vulcanized in one piece by a vulcanization process, forming a seamless bond, which improves the interface bonding strength, enhances the overall stiffness consistency, completely eliminates the component displacement risk of traditional assembled bushings, and achieves a comprehensive improvement in the performance, quality, and reliability of the bushing product.

[0026] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A double-rubber bushing that improves axial positioning and prevents frictional noise, characterized in that: It includes an inner sleeve (4); the inner sleeve (4) is provided with a main body rubber (5); the main body rubber (5) is provided with an outer sleeve (1); the upper part of the outer sleeve (1) is provided with anti-collision rubber (7); the outer sleeve (1), the main body rubber (5), the inner sleeve (4) and the anti-collision rubber (7) are vulcanized together by a vulcanization process.

2. The double-rubber bushing according to claim 1, which can improve axial positioning and prevent friction noise, is characterized in that: The inner sleeve (4) has a through groove (3) in the center.

3. The double-rubber bushing according to claim 1, which can improve axial positioning and prevent friction noise, is characterized in that: The upper and lower parts of the main rubber (5) are both provided with recesses.

4. The double-rubber bushing according to claim 1, which can improve axial positioning and prevent friction noise, is characterized in that: The cross-section of the outer jacket (1) is a basic L-shaped structure, and the vertical part of the L-shape forms a mechanical stop.

5. A double-rubber bushing according to claim 1, characterized in that: The upper surface of the anti-collision rubber (7) is provided with multiple grooves (2) at equal intervals.

6. A double-rubber bushing according to claim 5, characterized in that: The upper surface of the anti-collision rubber (7) is also provided with a plurality of protrusions (6) at equal intervals. The protrusions (6) are staggered with the grooves (2), and the protrusions (6) are circular in shape.

7. A double-rubber bushing according to claim 5, characterized in that: The anti-collision rubber (7) has a ring structure, and the groove (2) provides deformation space for the anti-collision rubber (7) to form an air damping cavity.

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